Tear Lightning

About

A "D" girl who transfers into class Brynhildr. Prior to that, most of her life was spent being exploited. The moment she became a "D," first, the Mafia used her powers to produce gems, since it was one of her abilities, until she was rescued by Yuu. Second, she was treated like a goddess by a cult who worships the Dragons, and she was made to believe that she is one.

Her imaginary weapon takes the form of a Dragon.

After she starts to believe that she's a human, her imaginary weapon takes the form of electrified rainbow wings.

(Source: Wikipedia)